ETCR2900B Earth Resistance Online Detector

Main Functions

On-line Monitoring Of Grounding Resistance, Grounding Voltage
Earth Resistance Measurement Range:0.01Ω~2000Ω
Earth Voltage Measurement Range:AC 0V~600V
Communication Mode: RS485 communication,4G communication
Setting Alarm Threshold
Setting Monitoring Interval

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Product Introduction
Technical Parameter
Model comparison
Data download

Product Introduction

ETCR2900B Earth Resistance On-line Detector, also known as earth resistance remote on-line tester, contact type earth resistance on-line detector, which is used for remote monitoring the earth resistance and earth voltage on-line. The tester adopt with simple two-wire method or precision three-wire method to test earth resistance, and the average value rectifier method is used to test the earth voltage and monitor it on-line in real time. The detector with RS485 communication and 4G communication, User can conduct secondary development, form a network, and realize remote multi-point on-line monitoring, etc. according to the provided MODBUS communication protocol.It is suitable for power facility grounding, highway equipment grounding, meteorological lightning protection grounding, communication base station grounding, railway facility grounding, construction warehouse grounding and electrical equipment grounding, etc.
ETCR2900B Earth Resistance On-line Detector has LCD display, which can view the earth resistance value on site, set the alarm threshold value through the tester button, set the monitoring interval, with sound and light alarm prompt. The detector with guide rail mounting structure, which is particularly convenient for installation.
1. The detector adopt with simple two-wire method or precision three-wire method to test the earth resistance, and average rectifier method to test the earth voltage.
2. RS485 communication and 4G communication.
3. Setting Alarm Threshold
4. Setting Monitoring Interval
5.The detector with guide rail mounting structure, which is particularly convenient for installation.

Technical Parameter

1.Measurement Range & Accuracy

Measurement Function	Measuring Range	Accuracy	Resolution
Earth Resistance	0.01Ω~20Ω	±2%rdg±3dgt (Auxiliary earth resistance 100Ω±5%, earth voltage <10V)	0.01Ω
	0.1Ω~200Ω		0.1Ω
	1Ω~2000Ω		1Ω
Earth Voltage	0V~600V AC	±2%rdg±3dgt	1V

2.Technical Specifications

Power Supply	Standard: 12V-24V DC (± 1V DC), 400mA Max (External power supply)
Display Mode	4-digit LCD display
LCD Size	LXW 47mm×28.5mm
Measurement Mode	Precision three-wire measurement, simple two-wire measurement
Measure	Earth resistance: rated current transformer method, measuring current 11mA Max, 128Hz; Earth voltage: average rectification
Earth Resistance Measurement Range	0.01Ω~2000Ω
Earth Voltage Measurement Range	AC 0V~600V
Data Mode	Average value
Measurement Instruction	LCD countdown indicator during measurement
Measurement Time	Earth voltage: about 2 times/second; earth resistance: about 30 seconds/time
Number Of Measurement	More than 10,000 times
Cable Voltage	Measurement of earth voltage: measurement below AC 600V
Tester Interface	Plug-in terminal block: 9-pin terminal block
Communication Mode	RS485 communication; 4G communication
Measurement Range Gear Shift	Automatic shift
Memory	99 groups, with a small number flashing and displaying the "99" symbol on screen to indicate that the storage is full
Interval Time	Automatic monitoring interval setting range: 1~999 hours
Data Access	Data access function: ”MEM" symbol display
Overflow Display	Over-range overflow function: “OL” symbol display
Power Consumption	Standby: 25mA Max, measurement: 400mA Max
Alarm Prompt	Sound and light alarm
Alarm Setting	Detector panel button setting or Background software(developed) setting
Alarm Threshold Setting Range	Resistance: 0Ω~2000Ω
Low Power Supply Voltage Indication	When the power supply voltage is lower than 11V, the low power supply voltage symbol is displayed to remind the power supply to be replaced.
Detector Size	130mm×90mm×54mm
Weight	About 380g
Overload Protection	During testing the earth resistance: AC 280V/3 seconds between the ports of E-P and E-C
Insulation Resistance	Above 10MΩ (500V between the circuit and the housing)
Withstand Voltage	AC 3700V/rms(Between the circuit and the housing)
Electromagnetic Characteristic	IEC61000-4-3, Wireless frequency electromagnetic field≤1V/m
Suitable Safety Regulation	IEC61010-1, IEC1010-2-31, IEC61557-1,5, IEC60529(IP54), Pollution level 2, CAT Ⅲ 300V
Working Temperature & Humidity	-10℃~40℃;Below 80%RH
Storage Temperature & Humidity	-20℃~60℃;Below 70%RH

Model comparison

Product Picture	Product Model Name	Resistance Range	Voltage Range	LCD Displayer	Alarm Function	Power Supply	Communication Metod
	ETCR2900 Earth Resistance Online Detector	0.01Ω~2000Ω	0~600V AC	Yes	Yes	DC 12V	RS485
	ETCR2900B Earth Resistance Online Detector	0.01Ω~2000Ω	0~600V AC	Yes	Yes	DC 12V	RS485 4G

Data download

Download：

ETCR2900B Earth Resistance Online Detector

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